New issue 801: covering_grid fails if dims is a list https://bitbucket.org/yt_analysis/yt/issue/801/covering_grid-fails-if-dims-i... Kacper Kowalik: Following snippet is taken directly from the [documentation](http://yt-project.org/docs/dev/examining/low_level_inspection.html#examining...): ``` #!python from yt.mods import * pf = load('Enzo_64/DD0043/data0043') all_data_level_0 = pf.h.covering_grid(level=0, left_edge=[0,0.0,0.0], dims=[64, 64, 64]) ``` it yields: ``` #!text Traceback (most recent call last): File "issue_801.py", line 4, in <module> dims=[64, 64, 64]) File "yt/data_objects/construction_data_containers.py", line 411, in __init__ rdx[np.where(dims - 2 * num_ghost_zones <= 1)] = 1 # issue 602 TypeError: unsupported operand type(s) for -: 'list' and 'int' ``` Responsible: xarthisius